Springeri Damsel question

[JayM]

I’ve got two Springeri Damsels that are holding true to form and being completely peaceful. However, I noticed one of them pecking at my Blue Tang tonight. What I find odd is that the Tang did not seem to mind. Are these little guys known to be a cleaner fish? Or is something strange and/or sinister going on?

With the exception of this little bit of strange behavior, all of the inhabitants look, act and feed completely normal.

 

[Derrick0580]

They will eat flatworms and other pests so I would assume they may pick parasites off other fish.